linux-kernel - Re: [PATCH v6 6/7] refactor header includes to allow kthread.h inclusion in psi

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Message-ID: <20190320210403.GE19382@cmpxchg.org>
Date:   Wed, 20 Mar 2019 17:04:03 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     gregkh@...uxfoundation.org, tj@...nel.org, lizefan@...wei.com,
        axboe@...nel.dk, dennis@...nel.org, dennisszhou@...il.com,
        mingo@...hat.com, peterz@...radead.org, akpm@...ux-foundation.org,
        corbet@....net, cgroups@...r.kernel.org, linux-mm@...ck.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH v6 6/7] refactor header includes to allow kthread.h
 inclusion in psi_types.h

On Tue, Mar 19, 2019 at 04:56:18PM -0700, Suren Baghdasaryan wrote:
> kthread.h can't be included in psi_types.h because it creates a circular
> inclusion with kthread.h eventually including psi_types.h and complaining
> on kthread structures not being defined because they are defined further
> in the kthread.h. Resolve this by removing psi_types.h inclusion from the
> headers included from kthread.h.
> 
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>

> @@ -26,7 +26,6 @@
>  #include <linux/latencytop.h>
>  #include <linux/sched/prio.h>
>  #include <linux/signal_types.h>
> -#include <linux/psi_types.h>
>  #include <linux/mm_types_task.h>
>  #include <linux/task_io_accounting.h>
>  #include <linux/rseq.h>

Ah yes, earlier versions of the psi patches had a psi_task struct or
something embedded in task_struct. It's all just simple C types now.

Acked-by: Johannes Weiner <hannes@...xchg.org>